Examine source code of PurpleBlues

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "PurpleBlues",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(142, 157, 204)",
      "toolbar_text": "rgb(219, 244, 167)",
      "frame": "rgb(125, 132, 178)",
      "tab_background_text": "rgb(249, 249, 237)",
      "toolbar_field": "rgb(249, 249, 237)",
      "toolbar_field_text": "rgb(125, 132, 178)",
      "tab_line": "rgb(248, 112, 140)",
      "popup": "rgb(125, 132, 178)",
      "popup_text": "rgb(249, 249, 237)",
      "tab_loading": "rgb(248, 112, 140)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fed9f06a-8370-4768-8e62-c4b4f1e49329}"
    }
  }
}